Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Add missing libjpeg-dev library required by Dovetail Web Portal"
  - Add missing libjpeg-dev library required by Dovetail Web Portal

    This patch adds missing libjpeg-dev library required by Pillow. CI
    server does not have the library installed, resulting in unit test
    failures.

    Change-Id: Ie9d1cc763c3a510c026ef2067ce45c5551cd360b
    Signed-off-by: Stamatis Katsaounis <mokats@intracom-telecom.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 95d0fc5..03a86b9 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 95d0fc5ab45e55ee47b3bb2b39b811bd7dd0878f
+Subproject commit 03a86b9547431a29e2779213cf44442c7a302ce8